防盗链功能无法正常工作

blew

hotlink protection 设置好后，提示 There was an error while enabling hotlink protection.
查看详情如下：Apache detected an error in the Rewrite config.
Syntax error on line 6 of /home/chemica1/public_html/.htaccess.L2j274cU6pje9dBPpMn1vWxOGTDQCak3:
RewriteBase: only valid in per-directory config files
Please try again. Apache detected an error in the Rewrite config.
Syntax error on line 7 of /home/chemica1/public_html/.htaccess.4jyon9ZoLwngf2MfMMW7iLaxqehBZv9d:
RewriteBase: only valid in per-directory config files
Please try again.


打开public_html下的.htaccess内容如下
RewriteEngine on

RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://chemical-product.com/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://chemical-product.com$      [NC]
RewriteCond %{HTTP_REFERER} !^http://nbpermanentmagnets.chemical-product.com/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://nbpermanentmagnets.chemical-product.com$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.chemical-product.com/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.chemical-product.com$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.nbpermanentmagnets.chemical-product.com/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.nbpermanentmagnets.chemical-product.com$      [NC]
RewriteRule .*\.(jpg|jpeg|gif|png|bmp)$ - [F,NC]

请问是什么原因？？
防盗链虽然打开了，但是无法正常工作，请问应该怎么解决？？谢谢

大漠孤狼

联系hostmonster问一下吧，不清楚什么原因